Electric-lighting device



Sept? 1923.

INVENTOR,

'A TTORNE Ya.

R B BENJAMIN ELECTRIC LIGHTING DEVICE Filed Dec. 19. 1919 yam-m;

Patented Sept. 25, 1923.; V

UNITED STATES PATENT OFFICE.

, it REUBEN B. BENJAMIN, OF CHICAGO, ILLINOIS, ASSIGNOR T BENJ'AM ELECTRIC MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

ELECTRIC-LIGHTING DEVICE.

Application filed December 19, 1919. Serial No. 346,029.

To all whom it may concern.

Be it known that I, REUBEN B. BENJAMIN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Electric-Lightin Devices, of which the following is a full, 0 ear, concise, and exact description, referencebeing had to the accompanying drawing, forming a art of this specification.

y invention relates to electric lighting devices and more specifically to those which are designed'for. use where they are exposed to the action of vapors, acids and the like.

One of the objects of my invention is to provide an improved lighting device which will be suitable for use where it is exposed to the attack of va ors, acids and so forth and which device Wlll be simple in construc- IO tion, cheap to manufacture and durable and efiicient in use. 7

Another object of this invention is to provide means or preventing fumes and the like getting into the conduit line when the I globe of a lighting unit is accidentally broken.

In the drawings in which one embodiment of my invention is shown- F i 1 is a vertical sectional view showing 80 a lig ting device,

Fig. 2 is a detail perspective view of a conical packing member; and

Fig. 3 is a sectional view on the line 3-3 of Fig. 1. p

86 The construction shown comprises in gen- .eral a. lamp socket 10, a lamp 11 supported in the socket 10, a globe 12 enclosing the lamp 11 and a holder or supporting member 13 which supports the socket 10 and the i0 globe 12 and together with the globe 12 forms a moisture-proof and vapor-proof enclosure for the socket 10 and associated parts.

The socket 10 is secured to the holder 13 by means of a pair of screws 14 which extend through openings in the insulating base of the socket 10 and are threaded into the holder 13. The holder may be screwed on to the threaded end of the conduit 15 in which the feed wires 16 are enclosed, the threadedconnection between the holder 13 and the conduit 15 being moisture and vapor-proof and the conduit itself being of some acid resisting material such as lead.

To further insure against the entrance of vapor, moisture and so forth into the interior, a conical packing member 17 is provided through which the conductors 16 pass, this packing member being of rubber or other suitable material and being seated in a conical recess in the holder 13.

Should the globe 12 be accidentally broken and the socket 10 damaged, ordinarily vapors, moisture, etc, will get past the same and penetrate into the conduit system. This packing member 17, therefore, further insures against the entrance of the vapors, moisture, etc., into the conduit system which includes besides the conduit 15, a system of outlet boxes, switch boxes, and other elements.

For holding the conical packing member 17 in place and forcing it tightly into the conical recess in which it is seated, an annular washer 18 is provided which bears against the packing member 17 and is secured to the holder 13 by means of a pair of screws 19 (Fig.

To insure a vapor-proof and acid-proof connection between the holder 13 and the globe 12, an annular packing member or washer 20 is placed therebetween, the holder 13 being provided with an internally threaded skirt portion 21 in which the neck of the globe screws as shown in Fig. 1.

The holder 13 may be of any suitable metal or alloy best suited to resist the particular chemical action to which it may be exposed, such as zinc or an alloy of tin, lead and so forth.

The entire construction is such that there is no exposed part which is of a material which can be readily attacked by the vapors or acids to which it is exposed. The packing members 17 and 20 prevent moisture, vapor and acids from getting into the interior of the construction.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A gas-tight lighting device comprising a socket, a socket holder having a passage therethrough for the feed wires for said socket, a yielding packing in the feed wire passage, and means secured to said holder for 105 forcing said packing into gas-tight contact with the feed wires and said holder, said means forming a seat for said socket.

2. A gas-tight lighting-device comprising a holderhaving a passage for feed wires, a

packing in said passage arranged to f4; 2 a -tight packing in said gas-tight connection around the wires and y x t and an annular nwznber with said holder, a lamp when a supp rting hearing on said yielding paeI-cing or orcing means for said packing forming a seaii for said :aekin inio gas-fight wntact Wit] Said 5 aid socket, and means for i'eniova'niy aiiiaehfeed \"CiI'GS nil holder aid annular member gas forming a s ingsaid socket without distln'hing said eat for said socket.

tight connection. 7 In witne s \YiliflQO'i'. I have hereunto sub A lighting device comprising a lamp scribed inynzune.

Socket, :1 socket holder having a passage therethrough for the feed Wires for said REU HQN B. BENJAMIN. 

